Calculation Method of Flexural Capacity of Composite Beam in Negative Moment Area after Corrosion of Interfacial Bolt

5th International Conference on Environmental Science and Civil Engineering

生态环境科学;土木建筑工程

Xu, Bo^1^2 ; Zhu, Weiqing^1 ; Shang, Yang^2

School of Highway, Chang'an University, Xi'an

710064, China^1

Ordos Institute of Technology, Ordos

017000, China^2

关键词: Coefficient of variation;    Flexural bearing capacity;    Longitudinal reinforcement;    Negative bending;    Shear bearing capacity;    Shear capacity;    Simplified calculation formula;    Steel concrete composite beam;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/283/1/012033/pdf
DOI  :  10.1088/1755-1315/283/1/012033

来源: IOP

【 摘 要 】

In order to quantitatively calculate the stud shear bearing capacity after corrosion, this paper used the stud shear bearing capacity factor after corrosion to represent the stud corrosion degradation effects, and based on the analysis of the reasons for its reduction, the product between stud effective section area after corrosion and stud tensile strength was proposed to calculate the shear capacity coefficient. At the same time, based on the assumption of plasticity theory, the simplified calculation formula of the composite beam flexural capacity under hogging moment was derived by simplifying the sum of the flexural capacity of the steel beam, the longitudinal reinforcement in the concrete plate and the stud. The effect of interface stud corrosion for the flexural bearing capacity of steel-composite composite beam was considered by multiplying the stud Shear capacity coefficient after its corrosion, and the experimental data of 11 beams were combined to verify. The results showed that the calculated results of this method were highly consistent with the experimental results in the literature. The calculated results were on average less than 2% of the experimental results, and the coefficient of variation was only 0.01. The calculated results of the formula were consistent with the results of theoretical analysis in the literature, and the calculation method was simple and convenient. It can be evaluated for the composite beam flexural capacity under hogging moment with corroded shear studs.